Semi-peak value

Noise is one of the methods for detecting waveforms. Quasi-peak detection is a method that detects an intermediate value between peak detection, which senses the height of waveform peaks by setting the discharge time constant of the detector much larger than the charging time constant, and average detection, which senses the average value of the waveform. In quasi-peak detection, the time constant is typically defined by CISPR16. Peak detection has the characteristic of yielding higher measurement results when the noise duration is long and occurs frequently. Therefore, it is effective for capturing a perceptual measure of noise. Quasi-peak detection is also effective as a way to reduce peak value error due to long response times when measuring impulse-intensive noise with a meter-type measuring instrument.